Lexmark Optra C Service Manual - Page 97

5045-001 Dirt On Back Of Paper Service Check FRU 1 Paper 2 Lower fuser roller Attraction roll Discharge roll Cleaning brush 3 Attraction roll and springs Discharge roll and springs High-voltage contacts Charge roll spring 4 Feed guide Fuser entrance guide 5 Cleaning brush motor Action Paper must be the correct weight, see "Print Quality" on page 2-50. See "Spacing Table Service Check" on page 2-69 to aid in diagnosing the dirty or failing FRU. Check the cleaning brush is not damaged and there is no paper in the cleaning assembly. Check the attraction and discharge roll for damage, the high-voltage contacts for dirt or damage and the attraction and discharge roll springs. Replace parts as necessary. Check both guides for dirt or obstructions. Check the cleaning brush motor connector J55. Check the resistance of the cleaning brush motor. Rotate the brush and take several readings. The resistance should be approximately 40 ohms. Be sure the cleaning brush motor is cammed into the transfer drum at the end of a print cycle and that the cleaning brush motor runs. If the problem remains, replace the mechanical controller PCB. Diagnostic Information 2-65